Re: How to return a const handle (view) to a mutable member of an agregate

[Basile B. via Digitalmars-d-learn]

On Sunday, 13 March 2016 at 20:10:57 UTC, Basile B. wrote:
Unless the result is explicitly cast later it can't me modified.

import std.stdio, std.container.array;

struct Foo
{
    private Array!int arr;
    ref const(Array!int) view()
    {
        return arr;
    }
}

void main(string[] args)
{
    Foo foo;
    auto a = foo.view.dup;
}

...and any attempt will produce an error, like in my sample:

Error: mutable method std.container.array.Array!int.Array.dup is 
not callable using a const object